Hi there, I was hoping you might be able to help. Firstly, I'm pretty new to this. I was thinking of buying the Play Acoustic for live performance with gtr and vocal. I want to be able to mute the guitar input so that I'm only recording/looping what's coming in on the mic from time to time. My research so far tells me that you can't do it on the Boss RC 300, so that's ruled out for me Can Play Acoustic do this ? Thanks so much for your help.